Check that the multi vitamin contains those 3 key ingredients. It may be worth talking to Casportpony about tube feeding her over the next few weeks to build her up before you go away. Anorexia is also a symptom of wryneck. Perhaps you could find a family member to care for her while you are away.I started her on a multivitamin today in her water and she had no problem drinking it, which gave me a little hope. Her neck recently has been curling inward when she's on her side, which could be a sign of wry neck. None of the other chickens in my flock have shown these symptoms, she is the only one, so I don't believe she has Marek's. She is very skinny, and I have been handfeeding her and holding her up so she can drink. Without help, she is pretty much immobile. This scares me because I am going out of town in a couple of weeks, and though I will have someone checking in on the flock, I'm afraid that Pip (my silkie) won't survive while we're gone.